?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ando&rft.aufirst=Tsuyoshi&rft.au=+Ando+Tsuyoshi&rft.volume=45&rft.issn=0001-6969&rft.pages=19-22&rft.title=Acta+scientiarum+mathematicarum&rft.atitle=An+inequality+between+symmetric+function+means+of+positive+operators&rft.date=1983&rft.genre=article